Fourth Nord Stream leak spotted, NATO sees 'sabotage'

Gas leaks at Nord Stream 1 and 2 pipelines

The vast leaks have caused underwater gas plumes, with significant bubbling at the surface of the sea

Swedish authorities said Thursday a fourth leak was detected on undersea pipelines linking Russia to Europe following what NATO described as an act of sabotage.

The Swedish Coast Guard confirmed Thursday there were four leaks in total on the pipeline in the Baltic Sea -- two on the Swedish side and two on the Danish side.